A U.S. Army Reserve Soldier from the 414th Chemical Company out of Orangeburg, South Carolina, directs a role-player casualty to the decontamination center at Muscatatuck Urban Training Center (MUTC) in Butlerville, Indiana, May 10, 2017. Nearly 4,100 Soldiers from across the country are participating in Guardian Response 17, a multi-component training exercise to validate U.S. Army units’ ability to support the Defense Support of Civil Authorities (DSCA) in the event of a Chemical, Biological, Radiological, and Nuclear (CBRN) catastrophe.